on sunday they arrested rebekah brooks, i high-level trusted executive of rupert murdoch. her lawyer today said that this arrest took her by surprise, that she is not -- that she says she is not guilty of any criminal wrongdoing and that they held her for nine hours yesterday without presenting her with formal allegations or with actual evidence of any wrongdoing. richard. >> all right, thank you, stephanie. nbc's stephanie gosk with the latest on that. news corp published two full-page ads in the british press this weekend, including an apology from rupert murdoch. here's part of the second ad. saying, quote, apologizing for our mistakes and fixing them are only first steps. it may take some time for us to rebuild trust, end quote. let's bring in nbc news national investigative correspondent, michael isikoff. michael, good morning to you. how big of a threat is this in the news of news corp and this scandal? >> it's clearly becoming a bigger and bigger threat. what most people don't realize is that news corp is a huge u.s. media company that owns everything from 20th cent